Be Quiet! System Power 9 400W CM - Reliable Semi-Modular Power Supply

The Be Quiet! System Power 9 400W CM delivers dependable power with quiet operation for cost-effective PC builds. This semi-modular ATX power supply combines 80+ Bronze efficiency with DC-to-DC technology for stable voltage regulation across demanding workloads.

Efficient 80+ Bronze Certified Performance

Achieving up to 89% efficiency with 80 PLUS Bronze certification, this PSU minimizes energy waste and heat generation. The active PFC design ensures optimal power conversion while maintaining standby drain below 0.15 watts, meeting Intel C6/C7, ErP, and Energy Star 6.1 standards.

Dual 12V Rails for Multi-GPU Systems

Two independent 12V rails provide stable power distribution for CPU and GPU components. The unit includes two PCIe 6+2-pin connectors, supporting multi-GPU configurations for gaming and content creation systems. DC-to-DC conversion maintains tight voltage regulation even under heavy cross-loading conditions.

Quiet 120mm Temperature-Controlled Fan

The sleeve bearing 120mm fan operates at just 9.3 dB(A) at 20% load, increasing to only 15 dB(A) at full load. Temperature-controlled fan curves adjust speed based on thermal demand, ensuring quiet operation during light workloads while maintaining adequate cooling under stress.

Semi-Modular Cable Management

High-quality black sleeved cables provide clean aesthetics and simplified cable routing. The semi-modular design allows removal of unnecessary cables, improving airflow and reducing clutter. Includes 1x ATX 20+4-pin motherboard, 1x P4+4 CPU, 2x PCIe 6+2-pin, 5x SATA, 2x PATA 4-pin, and 1x FDD connector.

Comprehensive Protection Features

Full safety suite includes over current protection (OCP), over voltage protection (OVP), under voltage protection (UVP), short circuit protection (SCP), over temperature protection (OTP), and over power protection (OPP). These safeguards protect your components during power anomalies and ensure reliable long-term operation.

Technical Specifications

• Form Factor: ATX
• Series: Be Quiet! System Power 9
• Wattage: 400 W
• Modular: Semi Modular
• Compatibility: ATX 12V v2.51
• #Hide#Wattage Range: 300 - 400W
• Connectors: "1 x ATX-Motherboard (20+4-pin)
  1 x P4+4 (CPU)
  2 x PCI-E 6+2-pin (GPU)
  2 x PATA 4-pin
  5 x SATA 15-pin (HDD, Drives)
  1 x FDD (Floppy) "
• Rail Design: Dual +12V
• AC Input: AC200-240 V
• PFC: Active PFC
• Fan Type: High-quality 120mm fan
  Sleeve Bearing
• Fan Bearing: Sleeve Bearing
• Noise: dB(A) at 20% load: 9.3
  dB(A) at 50% load: 9.7
  dB(A) at 100% load: 15
• Max Certification: Bronze
• Efficiency: 80+ Bronze
  Up to 89%
• MTBF: "100,000 hours"
• Protection: Over current
  Over voltage
  Under voltage
  Short circuit
  Over temperature
  Over power
• Additional Features: See Overview
• Weight/Dimensions: 1.49 kg
  140 x 150 x 86 mm
• Package Weight: 2.3000 kg
• Warranty: 3 Years

Backed by a 3-year manufacturer's warranty and 100,000-hour MTBF rating, the System Power 9 400W CM provides reliable power for budget-conscious builds without compromising on quality or quietness.